diff --git a/chrome/content/zotero/components/icons.jsx b/chrome/content/zotero/components/icons.jsx
index 0bd109d520..3fd1ecd281 100644
--- a/chrome/content/zotero/components/icons.jsx
+++ b/chrome/content/zotero/components/icons.jsx
@@ -127,6 +127,7 @@ i('TreeitemNoteSmall', 'chrome://zotero/skin/treeitem-note-small.png');
 i('TreeitemPatent', 'chrome://zotero/skin/treeitem-patent.png');
 i('Treeitem', 'chrome://zotero/skin/treeitem.png');
 i('TreeitemPodcast', 'chrome://zotero/skin/treeitem-podcast.png', false);
+i('TreeitemPreprint', 'chrome://zotero/skin/treeitem-preprint.png');
 i('TreeitemPresentation', 'chrome://zotero/skin/treeitem-presentation.png');
 i('TreeitemRadioBroadcast', 'chrome://zotero/skin/treeitem-radioBroadcast.png', false);
 i('TreeitemReport', 'chrome://zotero/skin/treeitem-report.png');
diff --git a/chrome/content/zotero/xpcom/data/cachedTypes.js b/chrome/content/zotero/xpcom/data/cachedTypes.js
index 3509a0c2de..908ffa8153 100644
--- a/chrome/content/zotero/xpcom/data/cachedTypes.js
+++ b/chrome/content/zotero/xpcom/data/cachedTypes.js
@@ -485,6 +485,7 @@ Zotero.ItemTypes = new function() {
 			case 'newspaperArticle':
 			case 'note':
 			case 'patent':
+			case 'preprint':
 			case 'presentation':
 			case 'report':
 			case 'statute':
diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index df4025e3db..891582340a 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -474,6 +474,7 @@ itemTypes.conferencePaper		= Conference Paper
 itemTypes.document				= Document
 itemTypes.encyclopediaArticle	= Encyclopedia Article
 itemTypes.dictionaryEntry		= Dictionary Entry
+itemTypes.preprint               = Preprint
 
 itemFields.itemType			= Type
 itemFields.title        		= Title
@@ -587,6 +588,9 @@ itemFields.filingDate			= Filing Date
 itemFields.genre				= Genre
 itemFields.archive				= Archive
 itemFields.attachmentPDF		= PDF Attachment
+itemFields.repository            = Repository
+itemFields.archiveID             = Archive ID
+itemFields.citationKey           = Citation Key
 
 creatorTypes.author				= Author
 creatorTypes.contributor		= Contributor
diff --git a/chrome/skin/default/zotero/treeitem-preprint.png b/chrome/skin/default/zotero/treeitem-preprint.png
new file mode 100644
index 0000000000..f8d32da04a
Binary files /dev/null and b/chrome/skin/default/zotero/treeitem-preprint.png differ
diff --git a/chrome/skin/default/zotero/treeitem-preprint@2x.png b/chrome/skin/default/zotero/treeitem-preprint@2x.png
new file mode 100644
index 0000000000..9af2ddfe71
Binary files /dev/null and b/chrome/skin/default/zotero/treeitem-preprint@2x.png differ
diff --git a/resource/schema/global b/resource/schema/global
index 97e0a8efa2..3d52ff141d 160000
--- a/resource/schema/global
+++ b/resource/schema/global
@@ -1 +1 @@
-Subproject commit 97e0a8efa2cb2cf6c9853ceca334ec56180a9df0
+Subproject commit 3d52ff141d3c02d58692c835863f471e799cdb11